To solve this question, the user needs to understand the program specification and the field length for the status code.

Option A: 4. This option might be correct for some programs, but it does not match the specified program in the question.

Option B: 8. This option might be correct for some programs, but it does not match the specified program in the question.

Option C: 6. This option might be correct for some programs, but it does not match the specified program in the question.

Option D: 2. This option is the correct answer according to the program specification given in the question.

Therefore, the answer is: The Answer is D.